puck.js 2.1 as reed switch?

Is it possible to somehow use a puck.js v2.1 as a reed switch?

Documenation says that it is not possible with version 2.1: https://www.espruino.com/Puck.js#magnetometer

Puck.js v2 only You can use the puckjsv2-mag-level (About Modules) module to configure the Puck.js magnetometer for ultra low power mode (40uA) while acting like a reed switch (detecting when field strength is high or low). This will not currently work on Puck.js v2.1

I tried it with my 2.1 puck.js and it indeed does not work:

Uncaught Error: Puck.js v2 required for this module
at line 1 col 78
...2 required for this module");var e;exports.on=function(c){c=...
Uncaught TypeError: First argument to EventEmitter.on(..) must be a string
at line 2 col 34
require("puckjsv2-mag-level").on();

Any way to get this working?